Electrical socket-seal.



PLTENTED MAR.- 10,1908.

- L. T. HATFIELD. ELECTRICAL SOCKET SEAL.

APPLICATION FILED AUG-3, 1906.

woantoz LLEWELLYN "r, HATFIELD, or SACRAMENTO, CALIFORNIA.

ELECTRICAL SOCKET-fiEAL.

' Specification of Letters Patent.

Patented March. '10, 1908.

Application filed August s, 1900. 1 Serial No. 329,120.

To all whom it may concerni .Be it known that I, LLEWELLYNT. HAT- 1FIELD, a citizen of the United States, residing in Sacramento, in thecounty'of Sacramento and State of California, have invented certain newand useful Improvements 1n Electrical Socket-Seals, of which thefollowing is a specification;

This invention relates to electrical socket seals.

In an application filed by me on the 4th day of October '1905, seriallynumbered 281 ,290, I have claimed broadly a device for.

lamp, plug or the like to be fitted into thesocket when the sealingdevice is in place, and at the same-time prevent electrical con nectionwith the contacts of the socket being made without; destroying the sealin whole,

or in part.

Other and further objects Wlll appear in the following description andwill be more particularly pointed out in the appended claims.

In the drawing: Figure .1 is an elevation of a key socket partly insection. 2 is a plan view of the seal Fig. 3 is a plan view of anotherform of seal for accomplishing the same purpose.

Referring particularly to the drawings 2' 1 indicates a disk of a sizeto fit within the socket 2, provided. with slits 3 preferably radial,and a central erforation 4. Extending radially from the disk eachbetweena pair of slits are extensions 5.

The device may be made of metal stiff enough to permit the extensions 5,when bent at an angle 'to the disk, to expand against the inner wall ofthe socket 2 and prevent the removal of the disk, except'upondestruction of the device. Of course the destruction of the device bydistortion or other wise, would notify the company that access had beenhad to the current and the company could then charge for the current inaccordance with its rules. .To remove this devicefa hooked or pointedtool is introduced into the perforation 4 and the device is then mannerto indicate the date of the pulled out. In being pulled out, it is,owing to the radial slots, destroyed to-such an eX-' tent that furtheruse is impossible. The extensions do not interfere with the insertion ofthe plug 9 of the lamp or other device, yet electrical connection withthe-contacts of the socket cannot be made, as the disk is either spacedfrom the inner contact, or has its-inner face covered with insulatingmaterial as shown'at 7. The insulating material closes opening 4 andprevents a wire being introduced therethrough.

If desired, the device may b'e'rnade entirely of an insulating material.In all forms, the perforation 4 should be covered inside or out with anysuitable material toprevent access to the contacts therethrough.

In the form shown in Fig. 3, the radial extensions are dis ensedwith,making the device circular in orm. The devicemay be of such a size tofit tightly the walls of the socket so that it cannot be removed exceptupon the destruction or distortion of'the same.

Both formsmay be-made of paper, paper mach, or similar ma'terial, and inthis case, may be secured in the socket by an adhesive, as shown 'at 6.v

The device can be marked in any suitable sealing, as shown-at 8. r

Having thus described my invention, what I claim as new therein anddesire to secure by Letters Patent is 1. The combination a with anelectrical socket, of a sealing device arranged in said socket,permitting the insertion of a current consuming plug and reventingelectrical connection with the soc et contacts.

2. The combination with an electrical socket, of a sealing device heldin said socket to prevent access to the socket contacts and providedwith slits preventing the removal of the device exce t'upondestroying'the device.

3. The combination with an electrical socket, of'a sealing device heldin the socket to prevent access to the socket contacts and provided withmeans preventing the removal of the device except upon destroying thedevice.

4. The combination with an electrical socket, of a sealing diskarranged. in said socket to prevent access to the socket con-' tacts andprovided with radial slits.

5. The combination with an electrical socket, of a non-conducting diskheld against one of the contacts of the socket between the contact andthe mouth of the socket.

6. The combination with an electrical socket, formed to receive acurrent consuming plug, of a non-conducting sealin device arranged inthe socket to prevent electrical connection between the contacts of theplug and the contacts of the socket.

7. 'A sealing device constructed to fit within an electrical socket,comprising a non-conducting disk provided with slits, which render itcompressible to permit it to be forced into the socket, andautomatically exp ensible to cause it to engage with lhe socket whenintroduced.

8. A sealing device constructed to fit within an electrical socket,comprising a nonconducting disk provided with radial slits, which renderit compressible to permit it to be forced into the socket, andautonntticnlly expensible to cause it to engage with the socket whenintroduced.

9. The combination with the socket, and 2t lamp plug, of enon-conducting scaling disk interposed between the hnnp plug and asocket contact.

Theforegoing specificeltion signed at Sueramento California this 20thday of July, 1906.

LLEWELLYN T. I-lATFlEliD.

In presence of two witnesses V. L. HATFIELD, CORA BARNES.

